Prison-bar.



No. 886,129. PATENTED APR. 28, 1908. c. L. JACKSON & E. N. LOY. PRISON BAR APPLICATION PIL ED AUG. 13.1907.

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3 is also preferablyformed of hard metal UNITED sTATEs PATENT OFFICE.

CLARENCE L. JACKSON, F SANDUSKY, AND WARD N. LOY, or TIPPECANOE CITY, OHIO.

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Specification 'of Letters Patent.

Patented April 28, 1908.

Application filed August 13, 1907. Serial No. 888,865.

To all whom it may concern:

SON and EDWARD N. LOY, citizens of the United States, the residence of the said CLARENCE L. JACKSON being in the city of Sandusky, county of Erie, State of Ohio, and the residence of said EDWARD N. LOY being in the city of Tippecanoe-City, county of Miami, and State of Ohio, have invented certain new and useful Im rovements in Prison-Bars, of which the ollowing is a specification,'reference being had to the ac-' companying drawings.

Our invention relates to improvements in bars for use in the windows and doors of prisons, enitentiaries and the like.

The o ject of the invention isto provide a prison bar of this character which cannotbe sawed, filed or otherwise, severed by the inmates of a prison so as-tepermit of their escalpe.

ith the above and other objects in view the invention consists in the novel construction and the combination and arran ement of arts hereinafter described and c aimed an illustrated inthe accompanying drawing, in which Y igure 1 is a perspective view of one of our improved prison bars; Fig. 2 is' a longitudinal sectional view; Fig. 3 is a transverse section; Fig. 4. is a perspective view of the rotary rod 'or roller and Fig. 5 is a similar view of one of the bearings In the drawing 1 denotes one proved prison bars which comprises an outer casing 2 and. an inner element 3 which-is mounted for rotary movement. The cas' 2 which is adapted to be suitably secure in the frame of a window, door or the like, may be of any suitable form and construction but we preferably make it in the form of a hollow cylinder or tube of hard metal such, for instance, as case hardened steel. The innermember or element 3 is preferably in the form of a cylindrical rod or roller having a diameter slightly less than the interior diameter of; the casing or tube .2 and having its ends mounted in suitable bearings for This rod or roller such as case hardened steel and its outer surface is also preferably polished. While any suitable bearings maybe provided for I ive for the of our im- I the ends of the rod or roller to permit of the Be it known that we, CLARENCE L. JAOK- l free rotation of the latter, we preferably form upon its (ends talpered or cone-shaped pivots 4 which are a apted to engage and rotate in similar shaped sockets 5 formed in bearings 6. The latter are in the form of plugs or blocks which are inserted in the ends of the tube and secured therein by transverse pins or rivets 7 or in any other suitablernanne'r.

' In use a number of the bars 1 are arranged in parallel relation in. the frame of a door,-

window or the like. O to the provision of the rotary member or e ement Within the outer member or casing 2' of the bar it will be seen that even though said casing is sawed through it will be impossible to saw, file or otherwise cut or sever the rod or roller 3 since the latter; would rotate and prevent the saw orfile fromobtaining an urchase u on it. ar is simp e in construction so that it may be produced at. a small cost, and that it .is exceedingly strong and durable, and efiectfpurpose intended. Having t us described our-invention'what we claim is:

1. A prison bar comprising a tubular casing,bearin'g blocks-or plu arran ed in said casing and formed wit cone-s aped seats and a roller arranged within the casin and having its ends formed with cone-shape pivots to enga e said seats.

'2. A prison ar comprising a'tubular casin having a cylindrical bore, a cylindrical ro l'er arranged within the casing and havin its ends' reduced to provide cone-Sha e pivots,beari ng blocks or plugs arran mi in the bore of said casing andformed wit seatsto receive said pivots and transverse fasten 'ings for retaining said blocks or plugs in said casing.

' In testimony whereof we hereunto afiix our signatures in the presence of two wit-' It will be noted that the 

